开云体育

ok, probably the information check of the firmware shows Sysjoint. This was my espectation.Thank you!

Yahoo Mail: Suchen, organisieren, erobern

Am Mi., Juni 4, 2025 at 18:37 schrieb Claus - DO1SC via groups.io<do1sc@...>: I ordered one from Amazon, the brand name is Aursinc. Basicly it might be Sysjoint inside.

I ordered one from Amazon, the brand name is Aursinc. Basicly it might be Sysjoint inside.

Again, the standard impedance (resistance) against which the vast majority
of all things RF are measured is 50 ± j 0 ohms. Yes, the NANOVNAs contain
a 50-ohm bridge. Yes, this is the standard impedance throughout the RF/?W
industries.

However, anyone can normalize the center of the Smith Chart, the "bull's
eye", to any resistance he/she chooses. I much prefer the resistance
standard of 50 ± j 0.

Dave - W?LEV

On Tue, Jun 3, 2025 at 6:43?PM Team-SIM SIM-Mode via groups.io <sim31_team=
[email protected]> wrote:

Hi Dave

Thanks Dave for the reminder of the theoretical definition of the Smith
chart, but the blue bounded circle is more indicative of the rough limits
of good S11 accuracy of the NanoVNA which uses a simple 50 Ohm pure
resistance bridge, it may helps us to be quickly confident of the impedance
NanoVNA measurements ploted inside the blue circle . simple and usefull
vision I say.

73's Nizar

--

*Dave - W?LEV*


--
Dave - W?LEV

Try Amazon or Aliexpress


________________________________
From: [email protected] <[email protected]> on behalf of Werner via groups.io <whxde@...>
Sent: Wednesday, June 4, 2025 7:12 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] Need some general help about VNAs

@Claus
There are serveral brands in the market, looking all the same, for example Sysjoint, Seesii, Chelegance and other nonames.

In ebay I can find only Siisee. I imagine under the hood is Sysjoint, but the vendor put his brand label on it.
But I am not sure.
Ebay comes handy because they are in stock in Germany, delivery 3 days, and no additional toll/taxes.
Do you know something more?

@Claus
There are serveral brands in the market, looking all the same, for example Sysjoint, Seesii, Chelegance and other nonames.

In ebay I can find only Siisee. I imagine under the hood is Sysjoint, but the vendor put his brand label on it.
But I am not sure.
Ebay comes handy because they are in stock in Germany, delivery 3 days, and no additional toll/taxes.
Do you know something more?

You mentioned all the reasons why I did choose the Type F V2.

On Tue, Jun 3, 2025 at 02:54 AM, Ted Garrett wrote:

Show your pic of how you test and tune your traps for end fed half wave

W2AEW has an excellent video describing how it is done with A VNA and with a grid dip meter. His coupling is a little tighter than I would use. The looser the better because the coupling loop slightly effects the inductance of the trap.



Roger

Hi Dave

Thanks Dave for the reminder of the theoretical definition of the Smith chart, but the blue bounded circle is more indicative of the rough limits of good S11 accuracy of the NanoVNA which uses a simple 50 Ohm pure resistance bridge, it may helps us to be quickly confident of the impedance NanoVNA measurements ploted inside the blue circle . simple and usefull vision I say.

73's Nizar

My favorite of all the (inexpensive) NANOVNAs is the SAA-2N. Robust
packaging with a metal case and Type-N connectors. Further, the Type-N
connectors are securely fastened to the metal case instead of directly to
the internal PCB. It's a winner in my book for both ruggedness and
performance plenty adequate for my applications.

Dave - W?LEV

On Tue, Jun 3, 2025 at 6:40?AM Werner via groups.io <whxde=
[email protected]> wrote:

Okay,
thank you guys for all the informations.
About Deepelec, the Encoder-wheel is nice and probably makes more fun to
play with.
As I would like a 3 GHz version (for example QO100) probably I will not
decide for it.

For all I read, comparing the specs, the LiteVNA "6GHz" is on top, for the
1000 measurepoints, speed advantage and dynamic, if specs of all devices
are real.

But I think I will go to the NanoVNA-F "V2" 3GHz as a compromise.
This one has "only" 300 points and less speed, but the overall features
like housing, better display and mecanical construction (battery) is nice.
It seems to me that the developement is somewhat newer. More detailled.
A "V3" Version with 6GHz is already released, 800 measurepoints.
Here is a video comparision between the V2 and V3.

Interesting is the signal comparision (V2 is better), what I think is
preferable over the 800 points, and aside I dont need 6GHz.

I have no insight in the RF designs, mixer, switches, synthesizer,
advantages/disadvantages.
I read a lot and got some oversight. Thanks again, Werner

--

*Dave - W?LEV*


--
Dave - W?LEV

The attachment may help. Extreme left on the central horizontal axis is
zero-ohms. extreme right on the central horizontal axis is infinite ohms.


Dave - W?LEV

On Tue, Jun 3, 2025 at 4:07?PM Team-SIM SIM-Mode via groups.io <sim31_team=
[email protected]> wrote:

Hi All

As discussed many times here, the S11 accuracy domaine subject for
impédance measurement , May be we can summarize graphically in an
intuitive, simple and useful way by the domain inside the blue circle of
the Smith chart where the complex impedances are between 1 and 1000 Ohm ,
we can thus quickly be assured of the precision of our measurements by
simply glancing at the Smith diagram. see graph attached.
73's Nizar

--

*Dave - W?LEV*


--
Dave - W?LEV

Hi All

As discussed many times here, the S11 accuracy domaine subject for impédance measurement , May be we can summarize graphically in an intuitive, simple and useful way by the domain inside the blue circle of the Smith chart where the complex impedances are between 1 and 1000 Ohm , we can thus quickly be assured of the precision of our measurements by simply glancing at the Smith diagram. see graph attached.
73's Nizar

Show your pic of how you test and tune your traps for end fed half wave.

Okay,
thank you guys for all the informations.
About Deepelec, the Encoder-wheel is nice and probably makes more fun to play with.
As I would like a 3 GHz version (for example QO100) probably I will not decide for it.

For all I read, comparing the specs, the LiteVNA "6GHz" is on top, for the 1000 measurepoints, speed advantage and dynamic, if specs of all devices are real.

But I think I will go to the NanoVNA-F "V2" 3GHz as a compromise.
This one has "only" 300 points and less speed, but the overall features like housing, better display and mecanical construction (battery) is nice. It seems to me that the developement is somewhat newer. More detailled.
A "V3" Version with 6GHz is already released, 800 measurepoints.
Here is a video comparision between the V2 and V3.

Interesting is the signal comparision (V2 is better), what I think is preferable over the 800 points, and aside I dont need 6GHz.

I have no insight in the RF designs, mixer, switches, synthesizer, advantages/disadvantages.
I read a lot and got some oversight. Thanks again, Werner

From a user stand point the use of a rotary encoder as opposed to the jiggle/joystick or the push buttons is a more intuitive process. the push button included in the rotary encoder is also more intuitive as well. I have this function on another device and it is also easier for fat fingers as opposed to the jiggle stick of the tiny buttons.

I have the NanoVNA-F - think it's V2.

The last firmware updates increased the max data points somewhat. Don't
recall exactly what it was though. We've just moved so it's still packed up
somewhere.

I don't mess with anything UHF and up much. If I had it to do again, I'd be
tempted by one of the newer models that comes with N-Connectors and the
bigger screen. I hate the little SMA connectors for their fragility. The -F
is much easier to do firmware update though.


--
--Bryon, NF6M

FYI, there IS a GIO group specific to the Nanovna-F:

/g/nanovna-f </g/nanovna-f/files>

DaveD
KC0WJN


On Mon, Jun 2, 2025 at 10:11 Bob Ecclestone VK2ZRE via groups.io <becclest=
[email protected]> wrote:

Hello Werner,

Have a look at the Deepelec website. Look at his DeepVNA-101 which is
his latest offering with a rotary encoder instead of pushbuttons or a
rocker switch.
The developer there is Leon and he builds a unit pretty well compatible
with Sysjoint. He used to work there.
It is not a clone in the bad sense, Leon has made some useful tweaks to
the design. It is well made with quality accessories.
I know the Deepelec FW is compatible with the Sysjoint NanoVNA V2. The
V2 is no longer supported by Sysjoint, so this is a worthwhile update.
I do not think it is compatible with the Sysjoint NanoVNA V3 hardware.

If you decide to go that way, JUST MAKE SURE YOU BUY FROM HIS
RECOMMENDED STORE! I cannot stress this enough!

Just a work of warning, the FW update file contains 3 separate files for
the slightly different jogwheel, pushbutton or encoder models.
You need to load the correct FW file for the model you have. The
information on the website is quite clear. But if you buy a -101, it
will have the latest FW already loaded.

All Deepelec hardware is definitely NOT compatible with any version of
NanoVNA-H4 FW, Hugen or DiSlord.
Leon's V1.0.5 FW is not as up to date as the current Hugen/DiSlord
NanoVNA-H4 but it has an aluminium case, 800x600 IPS screen and up to
401 scan points. It is great in bright light.

That said, I think the current release of the Hugen NanoVNA-H4 hardware
may have a lower resolution 640x480 IPS screen now as the old TFT screen
has become unobtainium.
Someone else may be able to confirm or deny this.

BTW, there is a specific nanovna-f group if you would like to join that
group as well.

HTH.
Bob VK2ZRE

On 2/06/2025 10:31 pm, Werner via groups.io wrote:

Hello Dave,
yes its hard to find the right thing.
What I got is, that the Sysjoint NanoVNA-f V2 has now 301 measurepoints.

And Chelegance states the same.

The firmware between theese seems the same.
Probably these (and probably Seesii) are the same product but I am not

sure about that.

The overall construction of the NanoVNA-f V2 I would like some more than

the LiteVNA.

Well, I will look a littler further. Thanks a lot, Werner
I

Hello Werner, I own an Sysjoint NanoVNA-f V2 and am fully content. The resolution is good, also battery life and velocity.

Hello Werner,

Have a look at the Deepelec website. Look at his DeepVNA-101 which is his latest offering with a rotary encoder instead of pushbuttons or a rocker switch.
The developer there is Leon and he builds a unit pretty well compatible with Sysjoint. He used to work there.
It is not a clone in the bad sense, Leon has made some useful tweaks to the design. It is well made with quality accessories.
I know the Deepelec FW is compatible with the Sysjoint NanoVNA V2. The V2 is no longer supported by Sysjoint, so this is a worthwhile update.
I do not think it is compatible with the Sysjoint NanoVNA V3 hardware.

If you decide to go that way, JUST MAKE SURE YOU BUY FROM HIS RECOMMENDED STORE! I cannot stress this enough!

Just a work of warning, the FW update file contains 3 separate files for the slightly different jogwheel, pushbutton or encoder models.
You need to load the correct FW file for the model you have. The information on the website is quite clear. But if you buy a -101, it will have the latest FW already loaded.

All Deepelec hardware is definitely NOT compatible with any version of NanoVNA-H4 FW, Hugen or DiSlord.
Leon's V1.0.5 FW is not as up to date as the current Hugen/DiSlord NanoVNA-H4 but it has an aluminium case, 800x600 IPS screen and up to 401 scan points. It is great in bright light.

That said, I think the current release of the Hugen NanoVNA-H4 hardware may have a lower resolution 640x480 IPS screen now as the old TFT screen has become unobtainium.
Someone else may be able to confirm or deny this.

BTW, there is a specific nanovna-f group if you would like to join that group as well.

HTH.
Bob VK2ZRE

Hello Dave,
yes its hard to find the right thing.
What I got is, that the Sysjoint NanoVNA-f V2 has now 301 measurepoints. And Chelegance states the same.
The firmware between theese seems the same.
Probably these (and probably Seesii) are the same product but I am not sure about that.
The overall construction of the NanoVNA-f V2 I would like some more than the LiteVNA.
Well, I will look a littler further. Thanks a lot, Werner
I

I will offer a single bit of advice: Buy *only* from approved
distributors!!!

The clones do not have the same hardware and, therefore, do not perform as
well. Further, they don't take the advertised FW updates. Buyer beware!

In the US, I buy from randl.com.

Here is a treatment of most of your questions:



Dave - W?LEV

On Sun, Jun 1, 2025 at 8:38?PM Werner via groups.io <whxde=
[email protected]> wrote:

Hello, I am interested in buying a nanoVNA-F V2 or liteVNA.

I like the -F V2 aluminium case, the display resolution and the easy
firmware update process. I dont like only 101 measuring points.
I like the liteVNAs 1001 measuring points and speed, but the plastic case
and display resolution is.. well.. not so nice.

Related to the -F V2:
I know, the V3 is available, has 801 points, but I dont need 6 GHz and
signals and dynamic are less clean compared to the V2 (as I heard).
Aside, there are serveral brands, looking all the same, for example
Sysjoint, Seesii, Chelegance and other nonames.
Do they have all the same hardware? If yes, is the firmware compatible
between them?
I read that the Sysjoint hast 301 measurement point with firmware 0.5.x.
Is this the same with the other brands, like Seesii for example?
Its not easy to know, what you get in the bay when ordering one.

Related to the liteVNA:
The tech data seems more advances to me. Is the hardware design up to date?

Related to both:
If I do a measurement outside of house, save it, and want to see results
on my computer... (nanoNVA saver)
Is the saved data really data of the measurement or is it a photo only?

Sorry for this newbee questions, maybe someone can bring a bit a light
into the dark.
Many thanks!

--

*Dave - W?LEV*


--
Dave - W?LEV